Side-tracking tool



March 23 1926. 1,577,810

E. F. RAYMOND 511:5 TRACKING r001,

Filed March 5, 1925 24 24 'f 2 II l 22 f I 49 T IN V EN TOR.

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Patented Mar. 23, 1926.

UNITED STATES. PATENT OFFICE.

EDWARD I. B AYMQN D, OF SANTA FE SPRINGS, CALIFORNIA.

sr nn-rnacxme moon,

Application filed March 5, 1925. Serial No. 13,209.

- To all whom it may concern:

Be it known that I, EDWARD F. RAnroNn, a citizen of the United States, and resldent of Santa Fe Springs, in the county of Los Angeles, State of California, have 1nvented new and useful Improvements 1n Side-Track-ingTools, of which the following is a specification. v

This invention relates to a drilling tool especially serviceable in side tracking casing and ,tools lost in oil wells. Heretofore, ordinary drilling .tools have been much used for this work, and in some instances, the drillers have made slight changes in the bits,-th,ese changes being matters of individual choice. Nearlyall tools heretofore used for this purpose have been inefficient due to the friction encountered by rubbing against the casing. Difliculty has also been experienced in directing the tool around portions to be side tracked. It is the primary object of this invention to provide a tool'having a pilot for divert-, 'ing the tool from the usual path. Another obyect of this invention is to provide a toolhaving a follower portion Which will decrease the friction and act ,somewhat as a 'reamer. Another-object of this invention is to provide a tool wherein the cutting parts can be easily replaced. Rollers are provided in the follower portion of the tool,

and it is an object of this invention to'pro-- vide novel means for mounting the rollers in position, for lubrication of the same and for the supply of circulation fluids to the cutters. l a These ob ects together with other ob ects and correspondingaccomplishments are obtained by meansof the embodiment of my invention illustrated in the accompanying drawing, in whlch:

Fig. 1 is a side elevation, partly in section showing the complete tool; Fig. 2 is a section as seen on the line 2-2 of Fig. 1; Fig. 3 .1lS a section as seen on the line 3-3 of Fig. 1; Fig. 4 is a fragmentary view showing a section of the tool as seen onthe line of Fig. 1; and Fig. 5 is a cap to permit removal and replacement of the cutter blades on the rollers.

Referring more particularly to the drawing, the tool comprises a follower. body 6 having a threaded tapered pin 7 whereby it may be attached to the drill pipe or other means for rotating the tool. ,A peripheral recess e t nd abo the bo y in which r ll ers are inset. Extending axially through the body is a passage 9 having water courses 10 branchingtherefrom. There are, in the tool shown herein, four rollers mounted in the recess 8. 1

The'follower portion 6 of the tool is pro vided with a threaded socket to receive the pin of a; pilot, the body of which is indi-.

cated by 11. The body is tapered, and

mounted upon the sides thereof are cutter blades 13. "An openin-gor passage 14 commanic-ates with passage 9 and has watercourseslfi leading to the outside of the pilot body adjacent the tops of the blades 13.

The blades form the cutting portion of the pilot end of the tool, and in order to allow easy replacement thereof, the blades are formed separately and disposed in mortiss in the body, being welded to each other and to the body below the line indicated by 17,

thus making the tool integral at the tip 16.

In order to replace blades,.the pilot is removed and the tip 16 cut from the pilot body above the line 17. The blades may then be driven out of the position in the body, and

"new blades may be substituted, the tips being body and may be closed by a threaded plug 20. This construction permits the shaft 19 to be inserted into position through the lower bore. There are suitable bushings and washers provided for taking care of the wear. The upper bore orbearing has a duct 21 communicating therewith and opening through the top of the follower body.

This bore is arranged for the introduction of lubricant, which may be-performed by any well known means such as a grease gun. Mounted in the cylinders are blades 22 set in dovetail recesses. The blades slant in the same direction as tllelglades 13 on the pilot body. In order to perihit removal of the blades from the roller. cylinder, without requirin removal of the cylinders, I have provide a cutaway portion on. the follower ody at the and indicate by 2 3. This cutawayportion periphery best shown in Fig. 4

is so arranged that the inside of a blade 22 will clearthe wall of the body, and the blades may be driven upwardly and out, as shown in Fig. 4. The cap 24 normally-cmers the cutaway portion, and is conveniently held in position by dovetails and tenons and screws.

In the operation of the tool, it'is placed upon the drill pipe and used in the manner of an ordinary drilling tool. The pilot will cau e the tool to be directed to one side of the portion of the hole which it is desired to pass. The tool follows the lead of the pilot, the rollers in the followers cutting and bringing the hole to the desired size without causing any undue friction.

NVhat I claim is:

1. A tool of the character described comprising the combination of a tapered pilot body aving mortises extending longitudinally, blades mounted in said mortises and welded to f, :-m an integral tip.

' prising a tapered pilot body having longitudinally extending mortises, blades mounted in said mortises and welded to form an integral tip, and a follower bod detachably secured thereto, said follower dy having roller cutters inset in the periphery thereof and rotatable about axes extending longitudinally of said tool.

4. A'tool of the character described comprising the combination of a tapered pilot body having longitudinally extending mortises, blades mounted in said mortises and welded to form an integral tip. and a follower portion secured to said pilot end having lateral cutters.

5. A tool of the character described comprising the combination of a tapered pilot end having lateral cutters extending longitudinally, and a follower head portion detachably secured thereto having a peripheralrecess, rollers journalled in said recess 11 on axes extending longitudinally of said tool, said rollers having peripheral mortises,

blades having tenons inset 1n said mortises so as to be removable endways from'said rollers the ends of said blades overlapping the wall of said recess, removable caps on mg longitudinally of said tool, each of said rollers having peripheral mortises, blades having tenons inset in said mortises so as to be removable endways, the ends of said blades overlappingthe upper wall of said recess, removable caps on the periphery of said follower head portion whereby the ends of said roller blades may be cleared permitting removal of the latter.

7. A tool of the character described comprising the combination of a tapered pilot end having lateral cutters extending longitudinally thereof, and a threaded pin at its lar e end, and a follower head having a soc et to receive said pin and provided with an annular peripheral recess, rollers vjournalled in said recess upon axes extending longitudinally of said tool, eachof said rollers having peripheral mortises, blades having tenons inset in said mortises, so as to be removable endways, the ends of said blades overlapping the upper wall of said recess, removable caps on the periphery of said follower head whereby the ends of said roller blades may be cleared permitting'remov'al of the latter.

8. A tool of the character described com- )rising the combination of a tapered pilot )ody having longitudinally extending mortises, blades mounted in said mortises and welded to form an integral tip, a follower head detachably connected to said body, said follower head having an annular )eriphcral recess, rollers journalled in sai recess upon axes extending longitudinally of said tool, each of said, rollers having peripheral mortises, blades having tenons inset in said mortisesso as to be-removable endways, the ends of said blades overlapping the top wall of said recess, removable caps on the )eriphcry of 'said follower head where the ends of said roller blades may be c eared permitting removal of the letter.

In witness that I claim the foregoing I have hereunto subscribed my name this 27th day of February 1925.

EDWARD F. RAYMOND. 

